Open courseware from GitHub Professional Services for learning Git and GitHub, now hosting cheat sheets you can read, reuse, and serve internally.github
An open-source vulnerability management and ASPM platform that consolidates security findings, tracks remediation, and streamlines DevSecOps reporting.DefectDojo
A free Linux distribution for threat hunting and enterprise security monitoring with alerting, dashboards, PCAP, and case management.Security-Onion-Solutions